Attic Insulation R Value Map

Recommended home insulation r values.

Attic insulation r value map.

Having the correct amount of attic insulation can help you maintain a comfortable temperature throughout your home and help save money on your energy bills plus prevent major issues like ice dams in the winter. When calculating the r value of a multilayered installation add the r values of the individual layers. The table below shows what levels of insulation are cost effective for different climates and. The r value of some insulations also depends on temperature aging and moisture accumulation.

The amount and r value of your attic floor insulation depends on your geographical location zone. These r values are a sum meaning this should be the total r value once you add up the entire depth of insulation. The r value or r value is a measure of thermal resistance ability to resit heat traveling through it used in the building and construction industry. The map and chart show each region of the u s the subsequent zones and corresponding r values.

Installing more insulation in your home increases the r value and the resistance to heat flow. The higher r value the better insulation performance. R value is a measure of insulation s ability to resist heat traveling through it. Find your zone on the map and then use the above insulation r value chart to determine the level of insulation you need to properly insulate your attic walls floors and crawlspaces.

If you think you re among the 90 of us homes that are under insulated 1 performing a simple insulation inspection will help you determine your insulation needs.